Electrical equalizer system.



B. G. LAMME. ELECTRICAL EQUALIZER SYSTEM.

APPLICATION FILED NOV. 30, 1908.

Patented June 15, 1909.

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I M ll:lI m

WITNESSES:

BENJAMIN G. LAMME, OF PITTSBURG, PEN

NSYLVANIA, ASSIG NO R TO WESTINGHOUSE- ELECTRICAL EQUALIZER SYSTEM.

No. 925,357. Specification of Griginal application filed September 3, 190.7, Serial No. 391,214. Divided and this Patented June 15, 1909.

application filed November 30,

Lbtters Patent.

1908. Serial No. 465,328.

To all whom it may concern:

Be it known that l, BENJAMIN G. LAMME, a citizen of the United States, and a resident of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Electrical Equalizer Systems, of which the following is a specification, this application being a division of my application, Serial No. 391,214, filed September 3, 1907, allowed November is, 19-08.-

Myinvention relates to systems of elec-" trical distribution, and particularly to means for equalizing-the load upon the generator or supply station when the load upon the system is variable.

The object of my invention is to provide simple and effective meanathat may be emrequired by comparatively small ployed in connection-with the polyphas'e alternating current systems of distribution for absorbing or 'yieldingenergy in accordance with variations in load 'uponthe system, in such a manner that the load upon the gener ating or supply station of the system may remain substantially constant or may not exceed a predetermined value. It has heretofore been proposed to employ fly-wheels or other devices having considerableinertia in systems of distribution that supply translating devices requiring widely varying amounts of power, and to so drive the fi-y-wheels and control their operation that the load upon the distributing circuit will remain substantially constant, regards less of the variations in the amount of power the translating devices present system, a dynamo-electric machine, that may operate either as a motor or as a generator and to which a fiy-Wheel is mechanically coupled, is directly connected to the distributing circuit without the intervention of a rotary converter or other similar device, and the arrangement is such that but and inexpensive machines need be provided and only a single equalizer set is necessary for equalizing the load provided by a plurality of translating.

In the devices.

to the said machines. The armatures of'the machines are connected, respectively, to the various phases of the distributing circuit and the field magnet'windings are connected to phases of the circuit which the'corresponding armat'ures are conmay be nearly of the same' phases as the elec v tromotive forces of the circuits to'which they are connected. 1 The machines are causedto operate alternately as motors and generators by adjusting i-ngthe ratio of the electromo't-ive forces,- respectiv'ely of the distributing circuit and of the armatures of the machines, in With the variations in the load afforded by the translating devices, ener y being stbred in the fly-wheel when operating the machines clnnesas generators to supply current to the system;

In the single .fi'gure of the accompanying drawing, armatures 1 and 2 of two dynamoelectric machines of the commutator type of the diiferent phases of atwo-phase distributing circuit '3.'4 56 that may be supplied of the impedance devices. The controller 13 com rises, further, two Contact strips 1 6 and 17 that are disposed adjacentto the respec, tive sets of contact terminals, and two move able conducting segments 18 and 19 thatare movable over the contact terminals and strips and are actuated. by means of an electro-magnet winding 20 to which current other than those" to.

their field strengths, or by otherwise adjust asmotors' and yielded for operating the ma;

from a generator 7, or from any other suit-' 'erally connected tothe 'points of subdivision is supplied proportional'in amount to that.

nected, in order that the generated and counter electromotive forces of the armatures' accordance construct-ion are connected, respectively, to

traversing a distributing circuit by means of a series transformer 21. Thus, the positions of the movable conducting segments 18 and 19 with respect to the stationary contact terminals and strips, and also the amounts of impedance included in circuit with the field magnet windings of the dynamo-electric machines, are dependent upon the amounts of current required of the distributin circuit by a suitable load, such, for examp e, as an induction motor 22.

Since'the field magnet windings of the dynamo-electric machines are associated with different phases of the distributing cir cuit than those to which the correspondmg armaturesf are connected, the counter and generated electromotlve forces 1n the armatures will agree approximately in phase wlth the electromotive forces of the circuit, conamount, the movable conducting segments 18 and 19 of the controller will occupy such ositions that considerable amounts of the 1m edance afforded by the devices 11 and 12 i w' be included in circuit with the field magnet windings. The field magnet strengths will be thereby so reduced that the counter electromotive forces in the armatures will become less than the electromotive forces of the conductors to which the armatures are connected, andv the machines will, therefore, be caused to o crate as motors so as to store energy in the fiy-wheel 8 andin theremainder of the rotatable system. If the load increases, the amounts of im edance included in the field circuits will be ecreased and the field strengths will be correspondingly increased. The energy previously stored in the rotatable system, including the fly-wheel, is then yielded to operate the machines as generators of greater electromotive forces than the electromotive forces of the circuit conductors to which the armatures are connected. strengths of the machines in accordance with variations in the amount of current required of the distributing circuit, the ratio of the electromotive forces, respectively, of the dis tributing circuitand of the armatures is ad- :60 justed, and the machines are caused to oper- Thus, by adjusting the field ate as motors when the said current is less than a predetermined amount and as generators when the said current is greater than the predetermined amount.

I claim as my invention:

1. The combination with a two-phase alternating current distributing circuit, and two mechanically coupled dynamo-electric machines each having its armature associated with one pair of conductors of said circuit and its field magnet winding associated with the other pair of conductors, similar windings being associated with difierent pairs of conductors, of means for adjusting the field strengths of the machines .to cause them to operate as motors when the current required from the distributing circuit is less than a predetermined amount,

and as generators when the said current exceeds the predetermined amount.

2. The combination with a two-phase alternating current distributing circuit, and.

two mechanically coupled dynamo-electric machines, each having its armature associated with one pair of conductors of said circuit and its field magnet winding associated with the other pair of conductors, similar windings being associated with difierent pairs of conductors, of means for adjusting the field strengths of the machines in accordance with variations in the amount of current required of the distributing circuit.

3. The combination with a two-phase alternating current distributing circuit, of two mechanically coupled dynamo-electric machines, each having its armature associated with one air of conductors of said circuit and its field with the other pair of conductors, similar windings being associated with different pairs of conductors. Y

4. The combination with a two-phase alternating current distributing circuit and two mechanically coupled dynamo-electric machines/each having its armature associated with one air of conductors of said circuit and its field magnet winding associated with a different pair of conductors, of means for effecting ad ustment of the ratio of respective electromotive forces of the distributing circuit and of the armatures of the machines.

In testimony whereof, I have hereunto subscribed my name this 27th day of November, 1908.

I BENJ. G. LAhfl/QE.

Witnesses E. Lrvrnes'ronn, BIRNEY Hnvns.

magnet winding associated 

